Washington; [For sale by the Card Division, Library of Congress] 1969.
형태사항 :
xii, 333 p. 26 cm.
일반사항 :
Kept up to date by the Division's L.C. classification--additions and changes, and by an irregular cumulative publication issued by Gale Research Company, entitled Library of Congress classification schedules: a cumulation of additions and changes, Class K, subclass KF.